Uniform fibrous-structured hollow mesoporous carbon spheres for high-performance supercapacitor electrodes
Uniform fibrous-structured hollow mesoporous carbon spheres for high-performance supercapacitor electrodes
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用于高性能超级电容器电极的均匀纤维结构中空介孔碳球
DOI:
10.1016/j.electacta.2015.06.154
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发表时间:
2015-09
影响因子:
6.6
通讯作者:
Piaoping Yang
中科院分区:
文献类型:
--
作者:
Yujin Chen;Fei He;Shili Gai;Piaoping Yang
Uniform fibrous-structured hollow mesoporous carbon spheres (FHMCSs) have been synthesized by a simple template method using fibrous-structured mesoporous silica microspheres and resol precursor as silica template and carbon sources, respectively. It is found that FHMCSs have an ultra high specific surface area of 1121 m2g−1and large pore volume of 1.3 cm3g−1. The high surface-to-volume ratio is a favorable factor to obtain high specific capacitance and excellent rate performance. As expected, when used as supercapacitor electrodes, the FHMCSs exhibit high specific capacitance of 359.2 F g−1at current density of 1 A g−1and excellent cycle stability (92% retention after 5000 cycles). The energy density of the FHMCSs can be estimated to be 49.9 Wh kg−1at a power density of 500 Wh kg−1. Moreover, the FHMCSs electrode shows high energy density of 36.4 Wh kg−1even at the power density of 10000 W kg−1, suggesting a potential application in supercapacitors and other energy storage fields.
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